Cokin Filters
Cokin Filters are a wonderful, inexpensive way, to produce dramatic results.
I have used them, very successfully,
throughout my Photography galleries. This page concentrates, specifically on
"before & after" or "with and without" examples.
The Cokin Pola Green-Yellow
works wonders on landscapes, it dramatically enhances
the blues in the sky along with the yellows and greens of a landscape. It
is arguably
one of the single best filters available for nature photography.
A Gradual Grey
filter is darker at the top and gradually gets lighter until it is clear at the
bottom. This
effect makes the top of the image darker (such as underexposing a bright sky)
and the clear
portion of the filter allows the correct exposure balance in high contrast
situations.